Francis l



FRANCIS L. KING, OF WORCESTER, MASSACHUSETTS.

Letters Patmllly No. 97,202, dated. i Yorcmber 23, 1869.

IMPROVEMENT IN BORING-MACHINE.

The Schedule referredA to in these Letters Patent and making part of the 'fame To all whom itmtty concern:

setts, have invented ac'ertain new and improved Device for Securing in Position, at any desired Angle, the

Uprights or Carria'geelVays of the Angle-Boring Machine; and I hereby declare thel following to be a t'ull, clear, and exact description of the same, reference being had to the accompanying drawings, and the letters of reference thereon, which make a part of this specification, oi' which Figurel is afront ele ation of a sect-ion ot' a! berlinolnachin'e, showin g my im proved deviceadj usted therein.

Figure 2` is a side elevation ot' the same.:

Figures LLand 5 are views of the peculiar-shaped nuts used with the tightening-bolts.

rllhe object of myii-lventiou is to furnish a brace and tightening-bolt for the lower part ot" the uprights or carriagefways, which is simple of construction, and at the same time enables the operator to adjust vthe same 'quickly and secure] y, without the use ot'a wrench, and consistsof a combined movable ori-evolving brace., and doubleespindled bolt with the peculiar-shaped nuts, and admini-wheel or other convenient device,

which enables `the operator securelyv to grasp and turn the same with facility.

The construction, application, and operation ot' my improved brace and tightening-boltare best shown in ng. 1.

It may he made otl any suitable material. The wheel A, or anyother suitable projection may he used to e've the operator a iirmi grasp.

The combined brace andvboltli has a shoulder at each end, againstwhich the washers G (.1 are placed, which furnish a bca-ring against which the uprights H. are drawn, by simply turning the brace or bolt B.

At each end ot' the brace are spindles D l), on one of which a right-hand screw-thread is out, and on the other alcft-hand. These screws work in nuts E E, in which corresponding threads arev cnt.

.lhe. nuts .E E, best shown in figs. 4 and 5, are constructed with an oblong projection on the inner face, which slide in the slots in the semicircles F, and are thus prevented from turning.

A lipy or iiange. projects over, to grasp and hold the semieircles.

The construction and operation ofithe brace and boltma'y be reversed by making,r nuts ot' cach end ot' the brace, and attaching spindles to the inner projecltions ot' the nuts ll E, ou which right'and left-hand screws may be cut, to work in the nuts in each en d ot the brace. But being thus made, it would notbe as stift', and would be much more. liable to wear and get out of repair. i

rlhe operator, by simply grasping, and turning the brace B with his hand, draws both the nuts E E inward, by means oi' which the upright-s lll and semicircles F are drawn with doublel celerity and force, against the shoulders oi tho-brace, and the uprights are thus til-ml)v securedto the semicircles atany desired angle, and by reversing` the motion of the brace, the same' are as quickly loosened.

'hat claim as in v invention. and desire. to secure. by Letters Patent, is

The revolving brace B, tormed with its shoulders, and the washers (l U, hand wheel A, or other similar projection, right and left-hand screws l.) ll), and nut-s E E, ibrnicd with their projections on their inner t'aces, in combination with the uprights H H and semicircles F F, all constructed and'tnieratng substantially as shown and described, and t'or the purpose specified.

FRANCIS l'.. KING.

Witnesses:

S. F. WrruINe'rox, 'lunononn S. J'ouxsox. 

